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Search results

  1. A

    EFI Gurus needed. dragbike efi swap

    You can get about 400-500hp from a 1000-1300cc engine with single set (4) of injectors. Above that it might be beneficial to add another set and run them staged. I wouldn't bother with dual pumps, especially if it is going to be mainly race bike. Mechanical pump alone needs just slightly longer...
  2. A

    EFI Gurus needed. dragbike efi swap

    What I was trying to hint was that when compared to EFI the only benefit with mechanical injection is capability for huge fuel flow values. On all other aspects the EFI is clearly superior. I have to admit that my knowledge about mechanical injection systems is mainly theoretical. I have done...
  3. A

    EFI Gurus needed. dragbike efi swap

    In my opinion only valid reason to install mechanical injection is that you are going to use nitro as fuel :D For the throttle bodies it's good to keep in mind that these bike throttle body sets are sold on Ebay and elsewhere for very reasonable money. So there isn't much point to put huge...
  4. A

    EFI Gurus needed. dragbike efi swap

    Walbro 255lph pump is a good choice though a bit overkill for a NA bike engine. I have one on my bike and it takes about 8A at full voltage. The pump controller drops that to around 4A when full flow isn't needed. I'm not sure how well Walbros stand methanol. Probably fine for some time but who...
  5. A

    EFI Gurus needed. dragbike efi swap

    Yes, there seems to be a servo for the secondary blades. The manufacturers like to claim that the secondary blades are used to improve low end torque but I think this is more marketing jargon than truth. The main purpose of the secondaries is to soften throttle response and help passing noise...
  6. A

    EFI Gurus needed. dragbike efi swap

    Hi, I'm glad to provide help. However, I'm not going to try to provide ready list of required parts and complete instructions. Over the years I have seen that everyone wants to do things on their own way so that would be wasted effort. But feel free to ask anything what you want to know. If you...
  7. A

    Oil Cooler Effectiveness

    I'm not doubting your findings. I'm just wondering what is the actual mechanism of the temperature drop. I think it was equivalent in this sense. It was basically a controlled rectifier bridge and it wasn't doing any current shunting. The engine was stock when I installed it, if that matters...
  8. A

    Oil Cooler Effectiveness

    [2] Yes, it was simplified analysis since I was interested to get just a ballpark figure to estimate scale of heating power from the stator. So I can easily believe if you say it's 350W with a shunt regulator. However, this is a worst case situation when there is no load from the charging system...
  9. A

    Oil Cooler Effectiveness

    I know this has been debated here earlier and there is also some empirical evidence but I still have hard time believing that the regulator could drop engine temp significantly. Maximum power output of the generator is about 250W so I think in the worst case the stator can produce about...
  10. A

    83model to 82model crankshaft swap

    I think you will need the crank, rotor, stator and left hand cover. At least those were needed when a friend of mine did similar swap. On second thought that was a Katana engine that has smaller rotor and stator. So you might be able to re-use original stator and cover.
  11. A

    GS1100E modif and Mikuni

    Here are a couple of old dyno graphs from my GS1100. Carbs, stock engine except K&N filter in the stock air box and aftermarket 4-1 exhaust (quiet): http://www.amh-sivut.net/mopo/dyno_ennen.jpg EFI, pod filters and more free flowing exhaust: http://www.amh-sivut.net/mopo/dyno_nyt.jpg Please...
  12. A

    GS1000G mods- big bore and fuel injection

    "Normal" data logging is completely separate to trigger logging. It's on the top menu under "Data Logging" (surprise :) ). From there select "start logging" and then click "save" on appearing file menu. Once you have finished click "stop". Then you can use LogViewer to view the log.
  13. A

    GS1000G mods- big bore and fuel injection

    Congratulations! :clap:
  14. A

    Hayabusa and GSXR1000 fork extensions

    One thing to note with GSX-R1100 forks is how much extension the lower triple fitting will allow. Fork legs have larger diameter at lower triple clamp and the step to smaller diameter is just above the lower triple. So if you try to extend the leg from the top the lower triple won't clamp to the...
  15. A

    GS1100 5.5" rim?

    True. Space for the chain was very limited on GS1100. I don't know about the 750 but I guess it doesn't have any wider frame. The brake caliper will need some creativity as well. I used a GSX-F (Katana) caliper on GSX-R hanger with custom torque arm.
  16. A

    GS1100 5.5" rim?

    I have had a -90 GSX-R1100 wheel in aluminium -83 GS1100 swing arm. I used the GS sprocket carrier which gets the chain closer to the wheel. Custom spacers were necessary.
  17. A

    GS1000G mods- big bore and fuel injection

    Like I said I have one or two sets available soon. And if there is demand I can get another batch made quite easily. Unfortunately making this kind custom parts in small numbers isn't exactly cheap. But I think I can produce these for price that is reasonable compared cost and effort required...
  18. A

    GS1000G mods- big bore and fuel injection

    Well, I guess I could mass produce these for under $100 / set but I'm afraid there isn't mass demand. :) At the moment I'm going to make five sets and one or two of them will be spare. I don't know exact cost until a friend of mine gets rest of the mounting shafts machined but I think my costs...
  19. A

    GS1000G mods- big bore and fuel injection

    The 12-1 graph looks like it should work. It seems that the 24-2 is missing one tooth if I counted it right? Just for reference, here are a couple of additional photos of my 24-2 setup. It seems to work pretty well now. Though I had some noise at higher rpms. I had to add a series resistor...
  20. A

    GS1000G mods- big bore and fuel injection

    Looks good except one thing. Based on my experience 12-1 wheel may not work reliably on bike engines. The problem is sync up during cranking. If crank speed changes too much between two teeth controller firmware may get confused and not detect the missing tooth properly. This problem is...
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